Semiconductor Conduit Temperature Monitoring to Prevent Precursor Condensation
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Solution Overview
Problem
In semiconductor device manufacturing, non-uniform temperatures in vapor-phase precursor delivery conduits lead to undesirable condensation and particle contamination in processing volumes, affecting device performance and yield, as existing systems lack effective monitoring capabilities for components external to the processing volume.
Innovation Solution
A method and system for monitoring temperatures of delivery conduits and other external components using temperature sensors and a data acquisition device, coupled with a system controller, to receive and analyze temperature data and context information, enabling real-time monitoring and historical data analysis to prevent temperature excursions and ensure uniform heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If temperature monitoring is not implemented for external components, then device complexity is reduced, but manufacturing precision deteriorates due to non-uniform temperatures causing condensation and particle contamination
Solution Approach 1:
The monitoring system is segmented into multiple independent temperature sensors positioned at different locations along the delivery conduit, allowing localized temperature monitoring without requiring a complex centralized monitoring system. Each sensor independently monitors its local zone, enabling targeted detection of temperature anomalies.
Solution Approach 2:
A data acquisition device serves as an intermediary between the temperature sensors and the processing system controller, collecting and processing temperature data from multiple sensors before transmitting information to the control system. This intermediary layer simplifies the overall system architecture by consolidating data handling functions.
2Reliability
If comprehensive temperature monitoring is implemented, then reliability is improved through early detection of temperature issues, but device complexity increases due to additional sensors and data acquisition systems
Solution Approach 1:
The system implements feedback by continuously monitoring temperature data from multiple sensors and comparing it against predetermined control limits. When temperature excursions are detected, the system provides feedback to operators or automatically adjusts heating parameters to maintain reliable operation.
Solution Approach 2:
The monitoring system performs self-diagnosis by automatically detecting temperature anomalies and generating alerts without requiring external intervention. The data acquisition device autonomously collects, processes, and analyzes temperature data, reducing the need for manual monitoring and increasing system reliability.
3Measurement precision
If multiple temperature sensors are deployed along the delivery conduit, then measurement precision is improved for detecting non-uniform temperatures, but device complexity increases due to additional measurement points
Solution Approach 1:
Temperature sensors are strategically positioned at specific locations along the delivery conduit where temperature variations are most likely to occur, such as near heating elements and at conduit endpoints. This localized monitoring approach provides high measurement precision for critical zones without requiring sensors throughout the entire conduit length.
Solution Approach 2:
Multiple temperature sensor signals are merged and consolidated by the data acquisition device, which aggregates data from all sensors and presents a unified temperature profile. This merging of measurement data simplifies the complexity of having multiple sensors by providing a consolidated view of temperature distribution.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution prevents particle contamination by ensuring uniform temperatures along delivery conduits, improving device yield and process stability by allowing for timely detection and correction of temperature issues, thereby enhancing the reliability of semiconductor fabrication processes.
Implementation Method 1
a first plurality of temperature sensors disposed on, disposed adjacent to, or in intimate contact with the delivery conduit at a first plurality of locations along a length of the delivery conduit
Implementation Method 2
the delivery conduit is heated, such as with a flexible polymer heater jacket comprising a resistive heating element
Implementation Method 3
Heating the delivery conduit along the length thereof prevents condensation of the vapor-phase precursor therein
Implementation Method 4
non-uniform temperatures along the walls of the delivery conduit, such as cold spots, can result in undesirable condensation and, or, deposition of the precursor on the inner surfaces thereof
Implementation Method 5
a data acquisition device configured to receive information from the one or more temperature sensors through one or more respective communication links
Data Source
AI summary
Embodiments herein provide methods of monitoring temperatures of fluid delivery conduits for delivering fluids to, and other components external to, a processing volume of a processing chamber used in electronic device fabrication manufacturing, and monitoring systems related thereto. In one embodiment, a method of monitoring a processing system includes receiving, through a data acquisition device, temperature information from one or more temperature sensors and receiving context information from a system controller coupled to a processing system comprising the processing chamber. Here, the one or more temperature sensors are disposed in one or more locations external to a processing volume of a processing chamber. The context information relates to instructions executed by the system controller to control one or more operations of the processing system.